Sheet-metal-pipe crimper.



No. 699,527. Patented May 6, I902.

M. L. HUNKEB. SHEET METAL PIPE CBIIHPER.

(Application filed Feb. 17; 1902.

(No Model.) 2 Sheets-Sheet I.

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No. 699,527. Patented May 6,1902.

M. L. HUNKER. SHEET METAL PIPE CRIMPEB.

(Application filed Feb. 17, 1902. (No Model.)

2 Sheets-Sheet 2.

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MARTIN L. HUN KER, OF CANTON, OHIO, ASSIGNOR TO THE CANTON MACHINE ANDMANUFACTURING COMPANY, OF CANTON, OHIO.

SHEET-METAL-PIPE CFlIMPER.

SPECIFICATION forming part Of Letters Patent No. 699,527, dated May 6,1902.

Application filed February 17, 1902. Serial No. 94,388. (No model.)

T0 at whom it may concern:

Be it known that I, MARTIN L. HUNK R,a citizen of the UnitedStates,-residing at Canton, in the county of Stark and State of Ohio,

have invented a new and useful Sheet-Metab Pipe Crimper, of which thefollowing is a specification.

Myinvention relates to a machine for crimping and drawing in the end ofa sheet-metal pipe or for drawing in the end of a pipe which has alreadybeen corrugated, so the same can be entered into the end of anothersection for joining therewith; and the objects of my invention are toaccomplish this quickly by a single operation, thereby gaining speed inthe work, and to provide aIcrimping-head which will permit the pipe tobe removed therefrom without springing the drawn-in end out again forthat purpose. I accomplish these objects by the mechanism illustrated inthe accompanying drawings, in which- Figure 1 is a plan view of theentire machine; Fig. 2, a vertical longitudinal section of the same;Fig. 3, a front elevation of the same; Fig. 4, an inner end view of thecontractible crimper-head, and Fig. 5 a longitudinal section on line 5 5of Fig. 4.

Similar numerals refer to similar parts throughout the drawings.

On the bed-plate 1 are mounted the jour nal-bearing brackets 2, carryingthe shaft 3, on the rear end of which islocated the driving-pulley 4. Inthe forward end of the shaft are formed the several double cranks 5, 5",

5, and 5 located in the adaptation, as illus-' trated, respectively, inthe four-quarter directions from the center'line of the shaft and beingequally distant therefrom. On the forward side of the bed-plate isattached the crimper-plate 6, which in the adaptation illustrated hasthe four-quarter radial extensions 7, 7", 7, and 7. On the faces of thecrimperplate extension are attached the respective adjusting-plates 8,8, 8, and S by screws which regulate their contiguity.

Between the crimper-plate extensions and the adj usting-plates are therespective radially movable die plates 9, 9", 9, and 9, which preferablytravel in beveled channels in the crimper-plate extensions, as 10, sothat all wear and lost motion can be taken up by 5, 5, 5, and 5. madeand the respective cranks are so dithe adjusting-plates. Projectingforward from the inner parts of the respective dieplatesare the lugs 11,which carry the respective adj usting-screws 12, and on the inner endsof said die-plates are attached the respective dies 13 by the bolts 14,passing through the slotted holes15, an exact radial adjustment of thedies being made by the screws 12,acting against the lugs 16, projectedoutward from the faces of the respective dies. The adj usting-plates areprovided with the notches 17 for receiving the dies and the respectivelugs.

On the face of the crimper-plate and in concentric'line with the shaft 3is attached the crimper-head 18 by means of the bolt 19,which extendsthrough the crimper-plate and furnishes a central pin-bearing 20 for theshaft.

In each crimper-plate extension is provided an elongated slot, as 21,through which pass the respective posts 22, 22", 22, and 22, attached toor projected rearward from the respective die-plates. The several postsare pivotally connected with the respective links 23, 23", 23, and 23,which in turn are pivotally connected with the respective cranks Theseconnections are so rected from the center line of the shaft that byrotating the shaft the crimper-plates and attached dies will besimultaneously moved in radial lines-that is, toward and from the centerline of the crimper-head.

To crimp the end of the round pipe 24, the same is inserted between thedies and around the crimper-head when the dies are at the end of theiroutward movement, as shown in Figs. 2 and 3, and the dies are thensimultaneously brought inward by the rotation of the shaft, which crimpsthe end of the pipe according to the form of the dies and head. To drawin the end of the pipe, the crimping-faces of the dies and head25 and26, respectively, are inclined so as to converge inwardly to the rear,and when the crimperhead is formed solid, as shown in Figsrl and 2, whenthe pipe is removed from the head the drawn-in end springs out to enableit to pass over the enlarged part of the head. When the end of acorrugated pipe 27 is to be drawn in, the dies and head are shaped toconform with the corrugations, and the work is done as before described.

While only four several dies and four corresponding cranks are shown anddescribed, any number of dies and cranks can be used, according to thesize and shape of the pipe to be treated and the formation of thedesired crimping, without affecting the nature of my invention.

When it is not desirable to rexpand the drawn-in end of the pipe whenremoving it over the enlarged part of the crimper-head, the longitudinalridges 28 of the crimperhead l8 are made so they will automaticallycontract when the pipe is removed, as shown in Figs. 3, 4, and 5. Thisis done by forming the ridges separate from the head and loeating themin longitudinal channels 29, the inner sides of which are inclined andconverge inward from the rear forward. The collar or band 30 surroundsthe forward end of the crimper-head, under which the ridgepieces areheld in position, but are free to move endwise. The spring 31 isinserted between the head and the ridge-pieces, which normally hold theridge-pieces in their expanded relation. To more quickly contract theridge-pieces, the channels 29 are cut out to form the steep inclinedsurfaces 32, which enables the rear ends 33 of the ridge-pieces tocontract more rapidly, as shown by broken lines in Fig. 5. When the pipeis removed from the head, the drawn-in end carries the ridges forward,compressing the springs, which movement brings all the ridgessimultaneously inward and permits the drawn-in end of the pipe to passwithout springing it outward. The action of the spring then carries theridges back to their normal position.

What I claim as my invention, and desire to secure by Letters Patent,is-

- 1. In a sheet-metal-pipe crimper, a shaft,

a series of double cranks on said shaft,a head located in concentricline with said shaft, a series of radially-movable dies located aroundsaid head, and a series of links severally pivotally connected at oneend with the respective cranks and at the other end with the "respectivedies, the double cranks and links being arranged to move the diessimultaneously toward and then simultaneously from the head.

2. In a sheet-metal-pipe crimper, a shaft, a series of double cranks onsaid shaft, a series of radially-movable dies located around the line ofthe center of said shaft, and a series of links severally pivotallyconnected at one end with the respective cranks and at the other endwith the respective dies, the double cranks being arranged to move thedies simultaneously toward and then simultaneously from said centerline.

8. In a sheet-metal-pipe crimper, a head, longitudinal converginginclined channels in said head, ridge-pieces movable endwise in saidchannels, and springs acting to keep said ridge-pieces in their normalexpanded posi tion.

4. In a sheet-metal-pipe crimper, a head, longitudinal convergingchannels in said head, there being steep inclined parts in the bottomsof said channels near the larger end of said head, ridge-pieces movableendwise in said channels, and springs acting to keep said ridge-piecesin their normal expanded position.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

MARTIN L. HUNKER.

WVitnesses:

ROBERT A. SADDLER, HARRY FREASE.

